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adding support for distinct for dt2bv, re-entry harness for ~Context

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-07-27 09:02:56 -07:00
parent 375682e98d
commit 5f5ef8b38d
2 changed files with 20 additions and 2 deletions
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17
src/tactic/bv/dt2bv_tactic.cpp
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@ -60,10 +60,15 @@ class dt2bv_tactic : public tactic {
br_status reduce_app(func_decl * f, unsigned num, expr * const * args, expr_ref & result, proof_ref & result_pr) {
expr_ref a0(m), a1(m);
expr_ref_vector _args(m);
if (m.is_eq(f) && reduce_arg(args[0], a0) && reduce_arg(args[1], a1)) {
result = m.mk_eq(a0, a1);
return BR_DONE;
}
else if (m.is_distinct(f) && reduce_args(num, args, _args)) {
result = m.mk_distinct(_args.size(), _args.c_ptr());
return BR_DONE;
}
else if (m_t.m_dt.is_recognizer(f) && reduce_arg(args[0], a0)) {
unsigned idx = m_t.m_dt.get_recognizer_constructor_idx(f);
a1 = m_t.m_bv.mk_numeral(rational(idx), get_sort(a0));
@ -75,6 +80,15 @@ class dt2bv_tactic : public tactic {
}
}
bool reduce_args(unsigned sz, expr*const* as, expr_ref_vector& result) {
expr_ref tmp(m);
for (unsigned i = 0; i < sz; ++i) {
if (!reduce_arg(as[i], tmp)) return false;
result.push_back(tmp);
}
return true;
}
bool reduce_arg(expr* a, expr_ref& result) {
expr* b;
if (m_cache.find(a, b)) {
@ -203,6 +217,9 @@ class dt2bv_tactic : public tactic {
if (m.is_eq(a)) {
return;
}
if (m.is_distinct(a)) {
return;
}
if (m_t.m_dt.is_recognizer(a->get_decl()) &&
m_t.is_fd(a->get_arg(0))) {
m_t.m_fd_sorts.insert(get_sort(a->get_arg(0)));